The excerpt looks at the Enterprise potential that Ajax has and where it fits in with the other SOAs in an environment. They also talk about some of the benefits that using Ajax in Enterprise applications can have including:

They go on to talk about the services in an SOA (base, legacy, new, etc) and show where Ajax would fit in. There’s talk of the “orchestration” of the application (how it’s implemented) and that the interface layer of things is where Ajax reigns. They also mentions briefly two tools to implement these kinds of SOAs – Microsoft Atlas and the TIBCO General Interface.